Observed arrival · 2026-10-19
Fitment Ledger puts tire math on the page
A pair of tire-size and wheel-offset calculators, backed by fitment guides that explain the measurements and formulas.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Drivers comparing tire sizes or wheel fitment
- Worth noticing
- The offset tool reports inner and outer edge movement separately, with an editable flange allowance.
Field notes
The tire comparison includes speedometer estimates at 30, 45, 60, and 75 mph, while the offset reference is also available as a table for scanning instead of entering values. The methodology page says it documents equations, constants, one editorial assumption, and sources with a retrieval date. Fitment Ledger explicitly excludes vehicle lookup data, directing readers to the vehicle label and owner’s manual for vehicle-specific specifications.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue